update broken PKG_UPDATE rules, handle missing update rules * Makefile.in: add handling for packages with no update rule * src/gtk2.mk, src/gtk3.mk, src/libvpx.mk, src/taglib.mk, src/hunspell.mk, src/vala.mk : use github tags for version info * src/llvm.mk: add '?' to update url * src/openscenegraph.mk: update SED rule for version extraction * src/pthread-stubs.mk, src/qt5.mk, src/renderproto.mk, src/sm.mk, src/s2tc.mk, src/util-macros.mk: added dummy PKG_UPDATE rule * src/qscintilla.mk: change search name for version extraction * src/qtbase.mk: use short pkg version in update path * src/suitesparse.mk: update change in main url/version url * src/tre.mk: update download page link * src/vmime.mk: update download and update url * src/wget.mk, src/xapian-core.mk: update url, sed rule * src/wt.mk: update to use github download/update * src/src-msys-libcrypt.mk: update sed rule

diff -ur fits-1.0.7.orig/src/Makefile fits-1.0.7/src/Makefile
--- fits-1.0.7.orig/src/Makefile	2016-02-25 13:08:47.394452025 -0500
+++ fits-1.0.7/src/Makefile	2016-02-25 13:10:40.437730825 -0500
@@ -1,4 +1,6 @@
-MKOCT_FLAGS = $(shell pkg-config --libs cfitsio --cflags cfitsio)
+MKOCTFILE ?= mkoctfile
+PKG_CONFIG ?= pkg-config
+MKOCT_FLAGS = $(shell $(PKG_CONFIG) --libs cfitsio --cflags cfitsio)
 
 all: read_fits_image.oct save_fits_image.oct save_fits_image_multi_ext.oct
 
@@ -6,5 +8,5 @@
 	rm -f *.oct *.o
 
 %.oct: %.cc
-	mkoctfile --verbose -Wall $(MKOCT_FLAGS) $<
+	$(MKOCTFILE) --verbose -Wall $(MKOCT_FLAGS) $<